Data/hora: 05/06/2024 01:01:38

Provedor de dados: | 96
País: | Brazil
Título: | Impacts of limestone and nitrogen top dressing application on the potassium content in the soil profile and marandu-grass leaf concentration
Autores: | Balieiro Neto,Geraldo; Reis,Ricardo Andrade; Ruggieri,Ana Cláudia.
Data: | 2009-07-01
Ano: | 2009
Palavras-chave: | Mineral nutrition; Soil fertility; Urea; Urochloa.
Resumo: | The objective of this experiment was to evaluate the effects of nitrogen doses (0, 100, 200, 300, and 400 kg ha-1 year-1), with or without dolomitic lime covering application, on the potassium (K) soil content at depths varying form 0 to 5, 5 to 10, and 10 to 20 cm, and the potassium concentration in the plant. The experiment was carried out in a rhodic ferralsol with a slightly rolling relief, in a 5 × 2 factorial arrangement, in a complete randomized block design, with four replications. Nitrogenated fertilization caused a linear increase in the potassium concentration in the plant and also in the mineral content in the 0-5 cm soil layer. An effect of competitive inhibition occurred between the potassium and calcium absorption, and potassium and magnesium absorption. Although a significant fraction of potassium returned to the soil surface layer through the forage residue due to the increase in dry matter production caused by nitrogenated fertilization, the increase in the potassium concentration in the plant due to the doses of nitrogen demonstrated the importance of considering the potassium supply to the plant, when the forage mass is intensified through nitrogenated fertilization.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009000700002
Editor: | Sociedade Brasileira de Zootecnia
Relação: | 10.1590/S1516-35982009000700002
Formato: | text/html
Fonte: | Revista Brasileira de Zootecnia  v.38 n.7 2009
Fonte: | info:eu-repo/semantics/openAccess